Oil burner



R. E TALLEY Oct'. 7, 1930.

OIL BURNER Filed June 3, 1927 2 Sheets-Sheet l R O T N E V m WITNESSOct. 7, 1930 R. E. TALLEY-v 1,777,337

OIL BURNER Fil ed June 9, 1927 2 Sheets-Sheet 2 L, I a

19 Hllll u m m 2 7 30 44 2.9

WITNESS INVENTOR WW We? Jam Patented (Pct. 7, 1939 STATES RANDAL n..TALLEY, on noarn IRWIN, PENNSYLVANIA OIL BURNER Application filed June9, 1927.

This invention relates to liquid fuel burners for industrial heating,more particularly to improvements in combination oil and gas burners.

It is among the objects of the invention to provide a burner of simpleand durable me chanical constructioncomprising a minimum number ofoperating parts and which is particularly designed to eliminate packingglands and other joints which commonly cause trouble by leakage in theoperation of burners heretofore constructed.

Another object of the'invention is to provide a burner in which the fuelnozzle and particularly its needle valve is close to the pointof meetingof the air whereby maximum atomizing efficiency is obtained and in whichthe burner-tip or throat of the burner from which the combustiblemixture .enters the furnace is designed to allow for the proporinduction of air whereby the power required to deliver air forcombustion is materially reduced.

Another object of the invention is to provide a control for theatomizing air valve by means of which micrometric adjustments of the airvalve may be secured to the burner tip without restricting the pressureof the air or its velocity.

Another object of the invention is to pro vide a burner in which thefuel nozzle and air nozzle are independently adjustable to regulate theflow of fuel and. air and in which the nozzles shall be adapted forrelative adjustment to change the point of atomization in accordancewith the available air pressure and velocity.

Stil another object of the invention is to provide a burner of the abovedesignated character in which the oil is circulated through the burnerhead whereby the chilling of oil in the supply line leading to the headis eliminated whether the burner is in operation or not.

In the accompanying drawings constituting a part hereof and in which.like reference characters designate like parts, Fig. 1 is an endelevation of a combined liquid fuel and gas burner embodying theprinciples of this invention; Fig. 2 is a side elevational view SerialNo. 197,543.

thereof partially in section illustrating the general arrangement ofparts and the oil, air and gas nozzle-s Fig. 3 is a longitudinalsectional elevation of the oil nozzle and burner tip and the regulatingmechanism therefor; and Fig. 4 is a cross sectional View of the gasnozzle shown in Fig. 2.

Referring to Fig. 3 of the drawings the structure therein illustratedcomprises a bracket 1 rigidly secured to a burner body 2 by screws orbolts 3 which are disposed through openings 4 in the flange or spiderportion 5 thereof. The bracket 1 is provided with an entending sleeveportion having a central opening adapted to receive an oiltube 7 whichis accurately fitted for sliding axial movement therein, the tube andhead being sealed against leakage of pressure from the inside of theburner by a gland S.

The oil tube 7 is provided with threaded portions 9 and 10 on therespective ends thereof which are in screw engagement with a burner tip11 and an oil head 12 respectively. A needlevalve 13 is disposed withinthe tube 7 and projects through the head 12 at one end and the burnertip 11 at the other end. The end of the valve 13 is adapted to projectinto a relatively small orifice 14 pr vided with a valve seat 15 for thetip. A spider 16 is disposed in the burner tip 11 and is secured in acountersunk portion thereof as shown by the end of the oil tube 7 forbracing the needle valve stem. The burner tip 11 is of frustro-conicalshape the tapered body portion 17 of which cooperates with an air nozzle19 to constitute an air valve. The

outside conical'surface 17 of burner tip 11 is provided with flutedslots (not shown) to allow passage of a small amount of air from airnozzle 19 for the purpose of cooling the burner tip. It frequentlyhappens that a furnace is operating at full temperature withsome of itsburners-shut down, and the fluted slots in the burner tip prevent injuryto the shut-down burners from hot gases escoping from the burneropenings.

A packing gland 20 is secured to the oil head 12 for the valve stem 13and one end of the latter is provided with a hand wheel 21 by means ofwhich the tip of the needle valve may be manually adjusted relative toits seat 15. As shown in Fig. 2 the oil head 12 is provided withprojecting trunnion shaped bosses 24 to provide connections for a }pairof flexible conduits 25 and 26, Fig. 1, w iich constitute the oil supplyand return connections for the burner head. Again referring to Fig. 3 ofthe drawings, the oil head 12 together with its connected oil tube 7 areaxially movable in the member 1 by means of a screw and nut mechanism 27and 28, the latter comprising a boss formed intcgrally with themember 1. A hand wheel 29 is secured to the end of the screw 27 and thelatter is disposed through an opening in a downwardly pro ecting lugportion 30 of the oil head 12 so that when the wheel 29 is rotated toturn the screw 27 in the threaded portion of the member 28 the oil head12 and its associated tube 7 and burner tip 11 will be moved as a unitin the burner head. The purpose of such movement is to securemicro-n'ietric adjustments of the burner tip relative to its seat 18 inthe air nozzle 19.

Referring to Figs. 2 and 4. a gas nozzle 32, Fig. 4, is disposed aroundthe air nozzle 19 and secured in the burner body as shown in Fig. 2. Thenozzle 32 is provided with an ofi-set portion 33 having a threadedopening 34 for receiving a gas line connection 35 shown in Fig. 1 whichis provided with a valve 36 for regulating the gas supply to the burnerhead. The burner is also provided with an adjustable register 38 whichcomprises a stationary member and a movable plate both of which areprovided with perforations or openings 39 which may be angularlyadjusted by a gear segment 40. The register may be regulated to provideany suitable size of opening depending upon the volume of induced air itis desired to admit to the burner The gear segment 40 is actuated by ahand lever 41 to effect the adjustment of the register. The end of theburner body is provided with footings 42 by means of which the burner isattached to the furnace.

Referring to the member 19 in Fig. 3, the lower portion thereof isprovided with a flanged sleeve portion 44 by means of which the airnozzle is connected to a pipe line 45 Figs. 1 and 2, leading to an airblast. A blast gate 46 may be interposed in the air line to regulate thevolume of air delivered to the air nozzle 19.

The operation of the combined oil and gas burner is briefly as follows:

The oil is delivered to the burner head under pressure through the sideopenings in the oil head 12 by the flexible conduit 25. The amount ofoil delivered at the burner tip is regulated by adjustment of the handwheel 21 which regulates the openings at the needle valve seat. Theexcess oil delivered to the burner and not being used by that burnerpasses on through flexible hose 26 to the pipe line and thence to sourceof supply. \Vhen the oil flow has been adjusted the hand wheel 29 isrotated in a direction to draw the oil tip 11 from its seat 18 of theair nozzle to permit the desired flow of air from the air blast throughthe nozzle 19. The volume of air is regulated to obtain suitableatomizing efiiciency at the burner tip and for this purpose theparticular arrangement of the adjusting mechanism 2728 is provided,which permits micrometric adjustment of the tip 11 in the air nozzle 19.By these fine adjustments, efficient atomization of the fuel can beobtained when the burner is operating at very low air pressure. \Vhenthe air has been adjusted for atomization, the register 38 may beregulated by manipulating the lever 41 to obtain the desired amount ofinduced air for controlling and regulating the flame projecting from theburner tip to meet the particular requirements of the furnace.

If it is desired to utilize gas in conjunction with the oil burner, thevalve 36 is regulated to produce the desired flow of gas at the tip ofthe nozzle 32. It is. of course, obvious that gas fuel may be employedindependently of the oil burner for which purpose the air blast andregister may be utilized in the manner heretofore. described.

It is evident from the foregoing description of this invention thatcombination oil and gas burners made in accordance therewith providesimple and eiiicient means for securing maximum atomizing etliciency inthe consumption of oil fuel and to obtain the proper induction of air inthe furnace.

Although one of the embodiments of the invention has been hereinillustrated and described, it will be obvious to those skilled in theart that various modifications may be made in the details ofconstruction and in the arrangement of the several co-operating partswithout departing from the principles of the invention herein set forth.

I claim herein as my invention A burner comprising in combination astationary air nozzle having a constricted end, a slide bracket securedin (to-axial alinement with the constructed portion of said air nozzle,a tube slidably mounted in said bracket having a "fuel nozzle at one andcooperating with the constricted portion of said air nozzle toconstitute a valve therefor, an adj ustable valve disposed in said tubefor con trolling the passage of said fuel nozzle and a screw mechanismconnecting said tube and slide bracket whereby the fuel nozzle isaxially movable relative to the air nozzle without subjecting the fuelconducting tube and nozzle to angular movement.

In testimony whereof, I have hereunto set my hand.

RANDAL n. TALLEY.

